The progress bar for an estimatable duration in the "Build Executors" widget is no longer useful to understand the relative degree of completion, as there is no border anymore that indicates how wide "100%" would be in relation to the current progress. As the progress bar does not span the entire width of the widget, but is about half the width and off-center, it's very difficult to estimate the degree of completion.

On the "Build History" widget, it depends on whether the row in progress has a white or light grey background. Usually, it's light grey.